I didn't give a detailed explanation to the model, but I should have been more clear: they all seemed to know what to look for, they wrote explanations of what they were looking for, which were generally correct enough. They still got the answer wrong, hallucinating the locations of the anatomical features they insisted they were looking at.

It's something that you can solve by just treating the brain as roughly egg-shaped and working out which way the pointy end is, or looking for the very obvious bilateral symmetry. You don't really have to know what any of the anatomy actually is.